# Fatal Python error in VxWorks 7 SDK for Raspberry Pi 4

**URL:** <https://forums.windriver.com/t/fatal-python-error-in-vxworks-7-sdk-for-raspberry-pi-4/258>\
**Category:** VxWorks SDK\
**Created:** [November 26, 2023, 11:14am UTC](https://forums.windriver.com/t/fatal-python-error-in-vxworks-7-sdk-for-raspberry-pi-4/258 "2023-11-26T11:14:13Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![chrislo](https://yyz1.discourse-cdn.com/flex035/user_avatar/forums.windriver.com/chrislo/32/65_2.png) [@chrislo](https://forums.windriver.com/u/chrislo)\
**Post date:** [November 26, 2023, 11:14am UTC](https://forums.windriver.com/t/fatal-python-error-in-vxworks-7-sdk-for-raspberry-pi-4/258/1 "2023-11-26T11:14:13Z")

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Hi, I am currently working on a project that involves installing the VxWorks 7 SDK on a Raspberry Pi 400 and running Python applications to control hardware, specifically to illuminate some light bulbs.

I have followed the documentation, and set `rtpSpStackSize=0x1000000`. However, when attempting to execute the command `python3`, I encountered a Fatal Python error. Below are two images illustrating the error during the execution process. I am working with VxWorks 7 SDK version 1.5.1, and I have tested with two different versions of the Raspberry Pi firmware, namely 1.20200212 and 1.20230405. Unfortunately, neither version has allowed me to successfully run Python3.

I have come across a discussion on the Wind River forums regarding similar issues at the following link: [Raspberry Pi VxWorks Faults when booting](https://forums.windriver.com/t/raspberry-pi-vxworks-faults-when-booting/142). Some users have reported encountering the same Fatal Python error, but the resolution details remain unclear.

I am reaching out to seek solutions in resolving this issue. Any insights, suggestions, or troubleshooting steps would be immensely helpful. Thank you.

 ![vxworks1](https://canada1.discourse-cdn.com/flex035/uploads/windriver1/original/1X/334d007859f76c32ec72c7c29d259936339c5ac7.jpeg)  
 ![vxworks2](https://canada1.discourse-cdn.com/flex035/uploads/windriver1/original/1X/9b0314e1a35e8bd5b35aad02462816055ab3b5e4.jpeg)

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**Author:** ![dan.milea](https://avatars.discourse-cdn.com/v4/letter/d/4bbf92/32.png) [@dan.milea](https://forums.windriver.com/u/dan.milea)\
**Post date:** [November 27, 2023, 5:42am UTC](https://forums.windriver.com/t/fatal-python-error-in-vxworks-7-sdk-for-raspberry-pi-4/258/2 "2023-11-27T05:42:32Z")

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Hi @chrislo ! Issues similar to the one you mentioned are most likely caused by an incomplete file system copy. The solution is presented in this [post](https://forums.windriver.com/t/raspberry-pi-vxworks-faults-when-booting/142/20) in the thread you linked in your post.

Hth,  
Dan